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Published byReynard Howard Modified over 5 years ago

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The law of orbits: All planets move in elliptical orbits, with the sun at one focus.

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Planetary orbit eccentricities Mercury.206 Venus.0068 Earth.0167 Mars.0934 Jupiter.0485 Saturn.0556 Uranus.0472 Neptune.0086 Pluto.25

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The law of areas: A line that connects a planet to the sun sweeps out equal areas in equal times.

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The law of periods: The square of the period of any planet is proportional to the cube of the semi-major axis of its orbit.

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Planet Semimajor axis (10 10 m) Period T (y) T 2 /a 3 (10 -34 y 2 /m 3 ) Mercury5.790.2412.99 Venus10.80.6153.00 Earth15.012.96 Mars22.81.882.98 Jupiter77.811.93.01 Saturn14329.52.98 Uranus287842.98 Neptune4501652.99 Pluto5902482.99

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Period of Jupiter is 11.86 years Find its distance to the sun?

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15 degrees per hour. With an orbit of 6.5 Earth radii Most satellites are only 200 km above Earth. They make one revolution every 90 min. 230 degrees per hour.

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